Cover for bolt openings



Jan. 26, 3.

- H. c. NIELSEN 2,309,473

COVER FOR'ABOLT OPENINGS Filed Oct. 16; 1941 Patented Jan. 26, 1943 UNHTED STATES PATENT QFFICE COVER FOR BOLT OPENINGS Hans C. Nielsen, Berlin, Conn.

Application October 16, 1941, Serial N0. 415,238

4 Claims.

My invention relates to the class of devices that are employed to cover enlarged openings for bolts and to prevent the entry of chips and dirt thereinto, and an object of the invention, among others, is the production of a device of this type that is simple in construction, inexpensive to produce, and one that will efliciently answer the purposes for which it is designed.

One form of a cover embodying my invention, and in the construction and use of which, the objects herein set out, as well as others, may be attained is illustrated in the accompanying drawing, in which- Figure 1 is an isometric view of a machine tool vise showing my improved cover in use thereon, the cover being raised from the opening but in proper position for application thereto to illustrate the invention.

Figure 2 is a view of a fragment of the device illustrating the cover in place thereon.

As this device is particularly applicable in connection with machine tool Vises for the protection of bolt openings therein commonly in the form of slots from entrance into such openings of chips and dirt produced by cutting tools in such machine, such a device has been selected by me to disclose my invention herein, the numeral 5 denoting a fixture forming a part of a machine tool vise, as a grinder, a lathe, or similar implement. This base comprises a graduated ring 5 upon which the base I of the vise is secured as by means of bolts 8 on opposite sides of the vise engaged with the fixture 5 through slots 9 in the base I, as shown in Fig. l. The bolts 8 are commonly formed with rectangularly shaped heads I engaged in T-shaped grooves ll frequently of annular form in the ring 6 whereby the angular positions of the device may be changed for application of work tools to work held in the vise.

The vise comprises a fixed jaw 12 and a movable jaw l3 operated as by means of a feed screw M in a manner that will be well understood by those skilled in the art and for which reason a further description of the vise is omitted herein, all of the parts thus far described being of old and well known construction.

My improved cover comprises a cap seated against a prepared surface 16 surrounding a slot 9, this cover closing said slot and preventing the entrance of chips and dirt into the top of the slot and therethrough into spaces underneath the base I. In the form of the device shown this cap I5 has a flap or apron II formed as an integral part thereof and extending at an angle thereto to fit closely against the surface around the slot 9 at the end thereof and opening out at the edge of the base 1, as shown in Fig. 2. The cap I5 has a hole to receive a bolt 8 and a nut it screw threadedly engages the bolt and thereby serves a double purpose of securing the base I in place on the ring 6 and also to secure the cover for the bolt opening tightly against thesuriace of the base I to tightly close the bolt opening and prevent the entrance of chips and dirt thereinto.

In accordance with the provisions of the patent statutes I have described the principles of operation of my invention together with the device which I now consider to represent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative and that the invention may be carried out by other means and applied to uses other than those above set out.

I claim:

1. The combination with the flanged base of a machine tool vise having a slot extending inwardly from the edge of said base and a bolt fitting loosely within said slot and within the zone of flying chips and dirt produced by cutting tools operating upon work held by said vise, of a cover comprising a cap to close the top of said slot and a flap extending at an angle to said cap to close the end of said slot, said cover being secured in place by a nut secured to said bolt.

2. The combination with the flanged base of a machine tool vise having a slot extending inwardly from the edge of said base and a bolt adjustably attached to a member of the vise and extending loosely through said slot and within the zone of flying chips and dirt produced by cutting tools operating upon work held by said vise, of a cover comprising a cap to close the top of the slot and a flap extending at an angle to said cap to close the end of the slot, said cover being secured in place by a nut secured to said bolt.

3. A cover for a bolt slot extending inwardly from the edge of a flanged base of a machine tool vise having a bolt fitting loosely within said slot, said cover comprising a cap to close the top of said slot, a flap extending at an angle to said top to close the end of said slot, and means to secure said cover in place by a nut secured to said bolt.

4. A cover for a bolt opening extending inwardly from the edge of a flanged base of a machine tool vise having a bolt fitting loosely within said opening, said cover comprising a cap to close the top of said opening, a flap extending at an angle to said cap to close the end of said opening, and a hole in said cap to receive said bolt to secure the cover in place by a nut threaded on the end of said bolt.

HANS C. NIELSEN. 

